“SiriusXM ready” means the receiver can work with SiriusXM satellite radio but does not include the satellite tuner or service. To receive SiriusXM channels you must install a compatible SiriusXM tuner (sold separately) and activate a SiriusXM subscription.
It varies by model. Many receivers allow two phones to be connected concurrently for hands‑free calling and may let one of those stream audio while the other handles calls. Other models allow multiple devices (often up to five) to be paired for quick switching or streaming, though only a subset can be active at once. Check the specific model’s manual or spec sheet for exact pairing and simultaneous‑connection limits.
Typical connections include USB ports (for media and charging), front AUX inputs, SD/SDHC card slots, RCA video outputs, backup camera inputs, and multiple preamp (RCA) outputs for speakers and subwoofers. Exact port counts and types vary by model.